Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
This commit is contained in:
Linus Torvalds
265
arch/m68k/sun3/sun3ints.c
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265
arch/m68k/sun3/sun3ints.c
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/*
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* linux/arch/m68k/sun3/sun3ints.c -- Sun-3(x) Linux interrupt handling code
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*
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* This file is subject to the terms and conditions of the GNU General Public
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* License. See the file COPYING in the main directory of this archive
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* for more details.
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*/
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#include <linux/config.h>
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#include <linux/types.h>
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#include <linux/kernel.h>
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#include <linux/sched.h>
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#include <linux/kernel_stat.h>
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#include <linux/interrupt.h>
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#include <asm/segment.h>
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#include <asm/intersil.h>
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#include <asm/oplib.h>
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#include <asm/sun3ints.h>
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#include <linux/seq_file.h>
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extern void sun3_leds (unsigned char);
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static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp);
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void sun3_disable_interrupts(void)
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{
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sun3_disable_irq(0);
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}
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void sun3_enable_interrupts(void)
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{
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sun3_enable_irq(0);
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}
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int led_pattern[8] = {
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~(0x80), ~(0x01),
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~(0x40), ~(0x02),
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~(0x20), ~(0x04),
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~(0x10), ~(0x08)
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};
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volatile unsigned char* sun3_intreg;
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void sun3_insert_irq(irq_node_t **list, irq_node_t *node)
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{
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}
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void sun3_delete_irq(irq_node_t **list, void *dev_id)
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{
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}
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void sun3_enable_irq(unsigned int irq)
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{
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*sun3_intreg |= (1<<irq);
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}
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void sun3_disable_irq(unsigned int irq)
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{
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*sun3_intreg &= ~(1<<irq);
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}
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inline void sun3_do_irq(int irq, struct pt_regs *fp)
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{
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kstat_cpu(0).irqs[SYS_IRQS + irq]++;
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*sun3_intreg &= ~(1<<irq);
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*sun3_intreg |= (1<<irq);
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}
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static irqreturn_t sun3_int7(int irq, void *dev_id, struct pt_regs *fp)
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{
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sun3_do_irq(irq,fp);
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if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 2000))
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sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%16000)
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/2000]);
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return IRQ_HANDLED;
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}
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static irqreturn_t sun3_int5(int irq, void *dev_id, struct pt_regs *fp)
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{
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kstat_cpu(0).irqs[SYS_IRQS + irq]++;
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#ifdef CONFIG_SUN3
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intersil_clear();
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#endif
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*sun3_intreg &= ~(1<<irq);
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*sun3_intreg |= (1<<irq);
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#ifdef CONFIG_SUN3
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intersil_clear();
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#endif
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do_timer(fp);
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#ifndef CONFIG_SMP
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update_process_times(user_mode(fp));
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#endif
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if(!(kstat_cpu(0).irqs[SYS_IRQS + irq] % 20))
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sun3_leds(led_pattern[(kstat_cpu(0).irqs[SYS_IRQS+irq]%160)
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/20]);
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return IRQ_HANDLED;
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}
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/* handle requested ints, excepting 5 and 7, which always do the same
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thing */
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irqreturn_t (*sun3_default_handler[SYS_IRQS])(int, void *, struct pt_regs *) = {
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[0] = sun3_inthandle,
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[1] = sun3_inthandle,
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[2] = sun3_inthandle,
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[3] = sun3_inthandle,
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[4] = sun3_inthandle,
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[5] = sun3_int5,
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[6] = sun3_inthandle,
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[7] = sun3_int7
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};
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static const char *dev_names[SYS_IRQS] = {
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[5] = "timer",
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[7] = "int7 handler"
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};
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static void *dev_ids[SYS_IRQS];
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static irqreturn_t (*sun3_inthandler[SYS_IRQS])(int, void *, struct pt_regs *) = {
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[5] = sun3_int5,
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[7] = sun3_int7
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};
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static irqreturn_t (*sun3_vechandler[SUN3_INT_VECS])(int, void *, struct pt_regs *);
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static void *vec_ids[SUN3_INT_VECS];
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static const char *vec_names[SUN3_INT_VECS];
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static int vec_ints[SUN3_INT_VECS];
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int show_sun3_interrupts(struct seq_file *p, void *v)
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{
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int i;
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for(i = 0; i < (SUN3_INT_VECS-1); i++) {
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if(sun3_vechandler[i] != NULL) {
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seq_printf(p, "vec %3d: %10u %s\n", i+64,
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vec_ints[i],
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(vec_names[i]) ? vec_names[i] :
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"sun3_vechandler");
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}
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}
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return 0;
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}
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static irqreturn_t sun3_inthandle(int irq, void *dev_id, struct pt_regs *fp)
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{
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if(sun3_inthandler[irq] == NULL)
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panic ("bad interrupt %d received (id %p)\n",irq, dev_id);
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kstat_cpu(0).irqs[SYS_IRQS + irq]++;
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*sun3_intreg &= ~(1<<irq);
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sun3_inthandler[irq](irq, dev_ids[irq], fp);
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return IRQ_HANDLED;
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}
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static irqreturn_t sun3_vec255(int irq, void *dev_id, struct pt_regs *fp)
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{
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// intersil_clear();
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return IRQ_HANDLED;
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}
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void sun3_init_IRQ(void)
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{
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int i;
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*sun3_intreg = 1;
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for(i = 0; i < SYS_IRQS; i++)
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{
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if(dev_names[i])
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cpu_request_irq(i, sun3_default_handler[i], 0,
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dev_names[i], NULL);
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}
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for(i = 0; i < 192; i++)
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sun3_vechandler[i] = NULL;
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sun3_vechandler[191] = sun3_vec255;
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}
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int sun3_request_irq(unsigned int irq, irqreturn_t (*handler)(int, void *, struct pt_regs *),
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unsigned long flags, const char *devname, void *dev_id)
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{
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if(irq < SYS_IRQS) {
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if(sun3_inthandler[irq] != NULL) {
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printk("sun3_request_irq: request for irq %d -- already taken!\n", irq);
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return 1;
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}
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sun3_inthandler[irq] = handler;
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dev_ids[irq] = dev_id;
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dev_names[irq] = devname;
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/* setting devname would be nice */
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cpu_request_irq(irq, sun3_default_handler[irq], 0, devname,
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NULL);
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return 0;
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} else {
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if((irq >= 64) && (irq <= 255)) {
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int vec;
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vec = irq - 64;
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if(sun3_vechandler[vec] != NULL) {
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printk("sun3_request_irq: request for vec %d -- already taken!\n", irq);
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return 1;
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}
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sun3_vechandler[vec] = handler;
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vec_ids[vec] = dev_id;
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vec_names[vec] = devname;
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vec_ints[vec] = 0;
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return 0;
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}
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}
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printk("sun3_request_irq: invalid irq %d\n", irq);
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return 1;
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}
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void sun3_free_irq(unsigned int irq, void *dev_id)
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{
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if(irq < SYS_IRQS) {
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if(sun3_inthandler[irq] == NULL)
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panic("sun3_free_int: attempt to free unused irq %d\n", irq);
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if(dev_ids[irq] != dev_id)
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panic("sun3_free_int: incorrect dev_id for irq %d\n", irq);
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sun3_inthandler[irq] = NULL;
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return;
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} else if((irq >= 64) && (irq <= 255)) {
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int vec;
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vec = irq - 64;
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if(sun3_vechandler[vec] == NULL)
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panic("sun3_free_int: attempt to free unused vector %d\n", irq);
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if(vec_ids[irq] != dev_id)
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panic("sun3_free_int: incorrect dev_id for vec %d\n", irq);
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sun3_vechandler[vec] = NULL;
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return;
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} else {
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panic("sun3_free_irq: invalid irq %d\n", irq);
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}
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}
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irqreturn_t sun3_process_int(int irq, struct pt_regs *regs)
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{
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if((irq >= 64) && (irq <= 255)) {
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int vec;
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vec = irq - 64;
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if(sun3_vechandler[vec] == NULL)
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panic ("bad interrupt vector %d received\n",irq);
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vec_ints[vec]++;
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return sun3_vechandler[vec](irq, vec_ids[vec], regs);
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} else {
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panic("sun3_process_int: unable to handle interrupt vector %d\n",
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irq);
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}
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}
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